Abiotic factors are the non-living things like temperature, soils conditions, water, etc. of a particular area that determine the kind of life surviving there. The article discusses these abiotic factors and how they affect living organisms. slide 1 of 8.
Also, it is rare, but if you are wearing socks for a long amount of time, and they start to itch, it may mean fuzzies from the socks are embedding in the creases in your feet, which cause the tiny pores in the creases of your feet to not be able to keep airing out.
Perhaps you have a fungal infection. Chronic itchy feet from an underlying tinea pedis (also known as athlete's foot fungus) is extremely common. It is more common in the summer due to increasingly sweaty feet. Fungus loves sweaty feet! Take a look at the skin on the bottom of your feet and in between your toes.